AMT与高精度磁测在红石泉地区铀矿勘查中的应用  

Application of MT and high precision magnetic survey in uranium exploration in Hongshiquan area

作　　者：李涛 杨明[2] 王伟 何佳军 LI Tao;YANG Ming;WANG Wei;HE Jiajun(No.203 Research Institute of Nuclear Industry,Xi’an 710000,China;Nuclear industry aerial survey and Remote Sensing Center,Shijiazhuang 050002,China)

机构地区：[1]核工业二〇三研究所,西安710000 [2]核工业航测遥感中心,石家庄050002

出　　处：《物探化探计算技术》2024年第1期103-110,共8页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：笔者应用音频大地电磁测深法(AMT)和地面高精度磁法并结合钻探资料,验证了红石泉地区深大隐伏断裂构造的地球物理异常解译标志,对该区主要控矿断裂(F1)及其次级断裂进行了有效探测,揭示了伟晶花岗岩与中元古界变质岩岩性接触带的深部展布特征,大致圈定出了主要成矿岩体伟晶状花岗岩体的空间分布情况。研究成果表明,组合使用AMT和地面高精度测法能够有效解决本区隐伏断裂构造和岩性接触带的探测问题。This paper combines audio frequency magnetotelluric sounding(AMT)and ground high-precision magnetic methods with drilling results to determine the interpretation basis of fault structure in the Hongshiquan area.The main ore-controlling fault(F1)and its secondary fault in this area are detected and analyzed,and the space position of the fault is effectively determined.Meanwhile,combined with the characteristics of rock physical parameters in the experimental area.The distribution characteristics of the lithologic contact zone between pegmatite granite and Mesoproterozoic metamorphic rocks are studied,and the spatial distribution of the pegmatite granite body of the main ore-forming rock body is roughly framed.The research shows that the combination of AMT and ground high-precision magnetic method is an effective physical method for fault detection and lithologic contact zone distribution.

关 键 词：音频大地电磁法 高精度磁法 铀矿勘探 构造断裂 隐伏岩体 

分 类 号：P631.3[天文地球—地质矿产勘探]